.box{
  width: 100%;
  height: 100%;
}
.box_jz{
  position: absolute;
  left: 50%;
  width: 1280px;
  margin-left: -640px;
}
.box_calendar{
  float: left;
  width: 350px;
  height: 350px;
}
.box_msg{
  float: left;
  width: 924px;
  margin-left: 6px;
}
